Process of grinding and polishing glass plates



AVAILABLE CQPY April 27 1926. 4 1,582,808

L. VON REIS PROCESS OF GRINDING AND POLISHING GLASS PLATES FiledJuly- 14, 1925 2 Sheets-Sheet 1 [n venfor.

.Qzrhber) 00,736

Adm-nay.

L. VON REIS PROCESS OF GRINDING AND POLISHING GLASS PLATES April 27, 1926. 1,582,808

Filed July 14. 1925 2 shets-sheet 2 Patented Apr. 27, 1926.

PATENT "OFFICE.

LAMBERT VON REIS, OF HERZOGENRATH, GERMANY.

. PROCESS OF, GRINDING AND POLISHING GLASS PLATES.

Application filed July 14, 1925. Serial No. 43,572.

To all whom it mayconcarn:

Be it known that I, LAMBERT voN Rnrs, a citizen of Germany, residing at Herzogen' rath, No. 25- Merksteinerstrasse, State of Prussia, Germany, have invented certain new and useful Improvements in a Process of Grinding and Polishing Glass Plates, for which an application was filed in Germany Aug. 15, 1923; and I do hereby declare the following to be a full, clear, and exact description'of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

In the known dressing of rough glass plates ,by submitting them to the successive operations of coarse grinding or smoothing, second grinding and polishingby passing,

for instance, a plurality of tables carrying the glass-plates beneatha series of grinding and'polishing appliances arranged in succession to one another, interruptions of the treatment are unavoidable in the polishing operation, because the feltsv of the polishers have to be interchanged or cleaned by washing from time to. time. Therefore,

' while the grinding appliances may continue their operation uninterruptedly, the polishing appliances must'be stopped temporarily for thepurpose of washing or interchanging the felts. c

The invention has for its object to avoid this disadvantage and to provide a process for grinding and polishing glass plates which is practically continuous. According to the invention, the polishing appli ances are caused to travel in the direction in which the glass is fed, so that 'inthe course 1 of the-process'a vacant space is produced between the appliances forseeond grinding and the polishing appliances; intothis vacant space is either placed a reserve polishing appliance or the foremost one of the pol-- ishing appliances in use after same has been lifted from the glass and its felts interchanged or washed, so that the same number of polishing appliances is always operatlng on the glass. Besides, it is possible to lift every'single polishing-appliance out'of the series of appliances if necessary, such. as in case an appliance requires repair, and to place in the space thus produced another polishing appliance, e. g., a reserve appliance.

In order to allow of the invention to be more readily understood it will now be deishing appliances,

Fig. 3 is a corresponding elevation illustrating the insertion of the foremost polishing appliance into the vacant space,

Fig. 4 is a vertical transverse section through the polishin portion of a plant deslgned to carry out the present process, and

Fig. 5 is a side elevation of this portion of the plant.

Referring'first to Figsl to 3, the numeral 1 designates the row of tables supportin'g the glass plates and moving-in the direction of the arrow w, 2 are the successively arranged smoothing appliances, 3 are the appliances for second grinding and 4 are the polishing appliances. The grinding appliances 2 and 3 execute their working movements without changing their positions, while the polishing appliances are caused to travel in the direction in which the glass is fed as shown in Fig. 2, so that in the course of the process a vacant space -is produced at A between the foremost one of the appliances 3 for second grinding and the rearmost oneof the polishing appliances 4. Upon this space having become sufliciently large, the foremost polishing appliance (see Fig. is lifted from the glass, its felts are interchanged or cleaned and the ap lianc'eis carried over the succeeding polishlngappliances in a direction opposite to the feed movement of the glass and then lowered into the space A so that it may immediately take part again inthe polishing of the glass. As the lifting of the appliance, the interchanging or cleaning of the felts and the transport of the same into the new position is executed very rapidly, the continuous treatment of the glass is not subjected to any interruption worth consideration.

I According to the polishing portion, shown in Figs. ,4 and 5, of the plant for carrying out the process, the table 1 supporting the glass plates (not shown) is adapted to slide on rails 5 and has imparted to it a linear movement by means of a gear 6 [ill through a shaft -7 and a pinion v8 which is in engagement with a rack bar 9 fastened to the underside of the table 1. above the table 1 are fourv polishing apph-' I claim and desire to secure by Letters-Pat ances 4 comprising each three polisnlng tools 4.

Arranged slides 11 and providedwith rack bars 12 which are in engagement with Pinions 13 fixed on the shaft 7 The supports 10 with thetools 4' are thus .caused. to travel in the direction of the feed of the glass. I Arranged to travel above the polishing appliances 4 is a lifting device 14. VVhen' the foremost polishing appliance has terminated' its operation on the glass, 1t.1s

' lifted-from the glass by means of the lifting device 14, as shownvin Fig, 5, its felts are interchanged or cleaned by washing These tools are mounted in supports 10' which are adapted to travel on' and replaced by a reserve appliance without disturbing the continuity of the process. Having thus described myinventioil', what cut is: I

1'. The process of grinding and polishing grinding and polishing appliances arranged in succession to one another, which consists in imparting to the polishing appliances a movement in .the direction of the feed. of

glass plates passing beneath a series of the glass so as to cause a vacant space to be at intervals formed between the forepolishing'appliance and inserting a polish- 'most grinding appliance and the rearmost ing appliance with clean felts into the said"- vacant space, for the purpose of avoiding .i

an interruption of the polishing operation. 2. The process of grinding and polish-' and it is then carried' by the device 1 l'gingglas's plates passing beneath a series of appliance in case the foremost one of the polishing appliances 4 has to be placedout',

of service for any reason.'

I Besides, any of the polishing appliances '4 may be'lifted from the glass for repair" grinding and polishing appliances arranged in succession to oneanother, which consists in imparting to the polishing appliances a movement" in the direction of the feedpf the glass so as to cause a'vacant-space to beat intervals formed between the foremost name to this specification.

MBERT; VON' inns.

mg appliance from the glass, providing it In testimony whereof I havesigned my 

